硫代硫酸钠 五水合物

InChI key

PODWXQQNRWNDGD-UHFFFAOYSA-L

InChI

1S/2Na.H2O3S2.5H2O/c;;1-5(2,3)4;;;;;/h;;(H2,1,2,3,4);5*1H2/q2*+1;;;;;;/p-2

SMILES string

O.O.O.O.O.[Na+].[Na+].[O-]S([O-])(=O)=S

agency

suitable for EPA 1621, suitable for ISO 25101

grade

puriss.

assay

99.0-100.5% (USP, dry basis), 99.0-101.0% (EP)

form

crystalline

quality

meets analytical specification of Ph. Eur., BP, USP

impurities

residual solvents, complies, ≤0.0005% heavy metals (as Pb)

loss

32-37% loss on drying, 16 h (vacuum)

pH

6.0-8.4 (20 °C, 10%)

anion traces

sulfate, sulfite (as SO₄^2-): ≤2000 mg/kg, sulfide (S^2-): in accordance

cation traces

As: ≤3 mg/kg, Ca: ≤50 mg/kg, Fe: ≤10 mg/kg

suitability

complies for appearance of solution

application(s)

PFAS testing

Quality Level

200